What happened: Diamondbacks ace Corbin Burnes has hit a setback in his recovery, with his rehab shut down after a lat strain. Burnes had been targeting a return around the All-Star break, but that timeline is now being pushed back. The development was reported by USA Today's Bob Nightengale.

Why it matters: Burnes is Arizona's frontline starter, and losing him deeper into the season strains a rotation already counting on his return. With the same Corbin Burnes now reportedly targeting a September return, the Diamondbacks must navigate the bulk of the schedule without their top arm, denting their margin in a competitive playoff race.

What to watch: Watch for an updated medical timeline from the Diamondbacks and whether the front office addresses the rotation ahead of the trade deadline.